squeaking noise on '88 80Q

[Oleg Rekutin]

Thank you! How unsafe is it to leave the timing belt like that?
Hopefully I can get to it by the end of this month, but I need to
replace the strut mounts, shot struts and control arm bushings
before that (direct safety issue).

- Oleg

On Fri, 08 Oct 2010 13:06 -0500, "Joshua Van Tol"
<josh at spiny.com> wrote:

  The "warbling" noise is caused by the timing belt being too
  tight. Try loosening it a touch, and it should go away. I've
  heard of dealer techs using a technique where the water pump
  is installed slightly loose, and the belt slightly tight. Then
  start the engine, and use a brass drift and hammer to loosen
  the belt a bit at a time until the noise goes away. Then
  tighten the bolts on the water pump the rest of the way.
  I've never had the guts to try that.
  The clicking might be a lifter, or perhaps the vacuum pump.
  You can test the latter theory by removing the push rod for
  the pump and see if it still makes noise.

On Fri, Oct 8, 2010 at 12:25 PM, Oleg Rekutin
<[1]quattro at 36hz.com> wrote:

  '88 80 Quattro 227k.
  Two videos: when running cold, almost no squeaking noise, but
  you can
  start hearing it:
  [2]http://www.youtube.com/watch?v=H1vAmZYXce8
  Idling warm, much more pronounced squeaking noise:
  [3]http://www.youtube.com/watch?v=VHUml_wfMlA
  When the engine is revved to 1500 RPM or so, the squeal/squeak
  goes
  away. It comes back when the RPMs return to idle.
  What could that noise be? Is this a pulley on an accessory
  belt of some
  kind? Or is this a major engine issue?
  Also, what's that clicking noise (easily heard in the "cold
  idle"
  video)?
  Thanks!
  - Oleg
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References

1. mailto:quattro at 36hz.com
2. http://www.youtube.com/watch?v=H1vAmZYXce8
3. http://www.youtube.com/watch?v=VHUml_wfMlA
4. http://www.audifans.com/mailman/listinfo/quattro
5. http://www.audifans.com/kb/List_information